TV highlights: Lady Gaga and the Muppets team up for a holiday special

Watch engineers and launch aficionados in Bridgeville, Del., compete in "Punkin Chunkin 2013" (Discovery at 8 p.m.), a comical competition where different-skilled groups try to come up with a contraption that launches pumpkins into the air. In the famed event, the team that launches a pumpkin the farthest wins.